What is your set up in low light?
(FYI the 2000 is going to perform better in low light especially if your shooting in HD)
There are many elements that can contribute to a good image in low light.
First and most valuable is getting more light on subject.
If low light is inevitable you need to learn how to operate in manual and find the right balance between iris, shutter and gain(more gain more grain).
First step in balance is open iris all the way, If your shooting static elements with little to no camera movement you can afford to drop the shutter below the “rule of thumb 1/60 threshold”. mind you that will result in a shutter effect on things that move. Next if totally necessary and if acceptable you can add a lil’ gain (thats were the grain primarily comes from)
May be obvious but make sure you dont have any ND filters on the image.
most important on low light shots is get more light. 🙂
P.S. HD needs more light than SD.